83 lines
2.8 KiB
C
83 lines
2.8 KiB
C
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/* $NetBSD: __sigaction14_sigtramp.c,v 1.9 2008/04/28 20:22:56 martin Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: __sigaction14_sigtramp.c,v 1.9 2008/04/28 20:22:56 martin Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <stddef.h>
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#include <signal.h>
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#include <errno.h>
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#include "extern.h"
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__weak_alias(__sigaction14, __libc_sigaction14)
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#ifdef __LIBC12_SOURCE__
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extern const int __sigtramp_sigcontext_1[]
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__weak_reference(__sigtramp_sigcontext_1);
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#endif
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int
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__libc_sigaction14(int sig, const struct sigaction *act, struct sigaction *oact)
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{
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extern const int __sigtramp_siginfo_2[];
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/*
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* If no sigaction, use the "default" trampoline since it won't
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* be used.
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*/
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if (act == NULL)
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return __sigaction_sigtramp(sig, act, oact, NULL, 0);
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#ifdef __LIBC12_SOURCE__
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/*
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* We select the non-SA_SIGINFO trampoline if SA_SIGINFO is not
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* set in the sigaction.
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*/
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if ((act->sa_flags & SA_SIGINFO) == 0) {
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int sav = errno;
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int rv = __sigaction_sigtramp(sig, act, oact,
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__sigtramp_sigcontext_1, 1);
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if (rv >= 0 || errno != EINVAL)
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return rv;
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errno = sav;
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}
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#endif
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/*
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* If SA_SIGINFO was specified or the compatibility trampolines
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* can't be used, use the siginfo trampoline.
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*/
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return __sigaction_sigtramp(sig, act, oact, __sigtramp_siginfo_2, 2);
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}
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